Door structure for heaters



Nov. 3, 1925. 1,559,554

I E.YP. COLE DOOR STRUCTURE FOR HEATER$ Filcd Nov. 14 1923 Edward gb :9 W Y jzgq I. I

Patented Nov. 3, 1925.

UNITED STATES: PATENT 0 EDWARD P." COLE, or CHICAGO, ILLINOIS, ASSIGNOR T0 Co-LE MANUFACTURING oom- PANY. or CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

noon STRUCTURE FOR HEATERS.

' Application filed November 14, 1923. ser al No. 674,834..

T 0 all whomit may concern: 7

Be it known that I, EDW RD P. COLE, a citizen of the United States, residing at ,Chicago, in the county of Cook and State of Illinois, have invented certain new and usefullmprovements in Door Structures for Heaters, of whichvthe following is a specification.

My invention has reference to a door and door casing, and seeks to provide a draft opening which: may be conveniently and effectively closed. I

The principal objects of my invention are to secure a permanent tight connection of a door casing with a heater casing; to provide a connection whereby a sheet metal door frame or casing may be secured directly to a sheet metal heater casing so as to provide a tight joint without'the necessity of employing castings or other extra parts; to provide means for fastening a door ini place against the doorcasing so that it closes tight thereagainst; to provide a door; fastener which cooperates with a toggle hinged door to force the latter flat against the door vframe and thereby insure a tight closure. of the door at all points against the door casing; and in general, to provide a simple and inexpensive door and door casing structure which insures a tight closure of the draft opening into the heater. J On the drawings: I

- "Fig. 1 is a front view of my improved door structure showing a fragmentary portion of the heater casing to which it is attached;

Fig. 2 a side view thereof with portions shown in section to disclose details. of the construction; and

of Fig. 1. 7

Referring to the drawings, the reference numeral 1 indicates a portion f the casing of a furnace or other heater, which casing is preferably of sheet metal andjformed with an opening 2 for the door casing. .The door casing which is indicated at 3, is made of sheet metal, stamped in a short tubular form to fit in the opening 2' in theheater casing, and has an outturned flange 4 at the inner end which is secured against the inner surface of the casing 1 around the opening 2 by bolts 5 which are'arrange'd at suitable intervals.

iThe wallof thecasing 3 adjoining the flange 4 is rounded as indicated at 6 in'EFig.

Fig. 8 a sectional view on the line 3-8 3, or otherwise flared somewhat so as to wedgingly engage the edge of the opening 2, as indicated in Fig. 3, when the flange 4 is clamped against the wall of the casing 1, and thereby afford a tight joint. The flange 4 is shaped to correspond to the form of the casing wall 1 aroundthe opening 2 so as to fit flat against the casing wall, and this connection together with the wedging engagement of the. curved or flared portion-'6 against the edge of the opening 2 insures a joint which remains tightly closed, and ,is not impaired by the expansion and contractionof the heater casing 1 and the door frame 3, particularly as both ofthe connected parts are made of sheet metal.

The outer .endofthe door casing 3 is provided with a draft opening 7 surrounded by an inturned flange 8 which, serves as'a seat for the door 9 which closes the opening.

The door seat or flange 8 ispreferably arranged in a plane at a slight angleto the vertical as indicated in Fig. 2, so that the door which-issuspended at the top, tends to close by gravity against the seat or flange 8. I r I Y .For supporting the door, there is a bracket 10v directly above the doorcasing 3 and preferably secured in place by means of the two upper bolts 5 which serve to fasten the flange 4 to the casing 1. Thisbrackethas a pair of laterally spaced outturned ears 11 With apertures 12; to receivethe pivot lugs 13 of the link or hanger 14. This link or hanger 14 at its outer endzis-provided with a pair of inwardly extending'pivot lugs '15 which engage in apertures 16 which are provided in spaced lugs 17 arranged on the outer face of and at the top ofthe door 9. The bearing apertures 12 are located above the 'door frame 3 and at the inner side of the plane of the-seat or flange 8 so that the .weight of'the door tends to close the latter the door which I prefer to employ, the door may not close by gravity sufliciently tight against the flange 8, and in order to hold the door closed and insure'a tight seating of same against the flange 8, I have provided av springfllatch; 18 which serves to clampthe door against the flange 8. This latch 18 comprisesa spring plate-which is 9. In a heater, the combination of a sheet metal casing having an opening therethrough, an annular sheet metal shell formed with an integral outturned flange at the inner end and an integral inturned flange at the outer end'and a flaring outer surface at the juncture of the first mentioned flange with the annular shell, means for clamping the outturned flange against the inner surface of the casing so as to wedgingly engage the flaring portion of the shell, against the edge of the opening in the casing, and a door closing against the inturned flange at the outer end of the shell.

10. In a heater, the combination of a door, an inclined seat against which the door closes, a door supporting link hanging the door, a spring latch for the door, said latch and link being arranged to cooperate and thereby clamp the door against the seat under tension at its surrounding edge.

11. In a heater, the combination of a door, an inclined seat against which the door closes, a door supporting link, a spring latch for the door, said latch and link being arranged at the side of the door remote from the link to hold the door downward and inward under tension against its seat, and means on the door to engage the seat and support the door in an open position.

12. In a door structure for heaters, a casing, an inclined seat projecting from the casing, a door hanger pivoted to the casing above the seat, a door pivoted to the lower end of the hanger and adapted to normally swing against the seat, a spring latch carried by the seat and engaging the lower portion of the door to firmly hold the door against the seat, and means to hold the door in an 0 en elevated position.

13.In a li door, an inclined seat against which the door closes, a door hanger pivotally supeater, the combination of a ported at its vupper end and to which the 3 door is pivoted adjacent the top ofthe seat, means to clamp the door against the seat, and a notched lug on the door to engage the seat and support the door in an open position. a

14. In a heater, thecombination of a sheet metal casing having an opening through the wall, a sheet metal door frame projecting gaging the door at a point remote from the hinge connection and adapted to force thedoor against the seat. j

EDWARD P. COLE. 

